22220220204 has 144 divisors (see below), whose sum is σ = 70998328128. Its totient is φ = 5701860864.

The previous prime is 22220220203. The next prime is 22220220229. The reversal of 22220220204 is 40202202222.

It is a happy number.

22220220204 is a `hidden beast` number, since 22 + 220 + 220 + 204 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22220220203) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29554 + ... + 212870.

Almost surely, 2^22220220204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22220220204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35499164064).

22220220204 is an abundant number, since it is smaller than the sum of its proper divisors (48778107924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22220220204 is a wasteful number, since it uses less digits than its factorization.

22220220204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183384 (or 183379 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 22220220204 its reverse (40202202222), we get a palindrome (62422422426).

The spelling of 22220220204 in words is "twenty-two billion, two hundred twenty million, two hundred twenty thousand, two hundred four".